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Лимит времени 2000/4000/4000/4000 мс. Лимит памяти 65000/65000/65000/65000 Кб.
Сложность Альфа
You are given a list of n
integers, and your task is to calculate the number of distinct values in the list.
Input
The first input line has an integer n
: the number of values.
The second line has n
integers x1,x2,…,xn
.
Output
Print one integers: the number of distinct values.
Constraints
Example
Input:
5
2 3 2 2 3
Output:
2
Для отправки решений необходимо выполнить вход.
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